<nz-radio-group [(ngModel)]="size">
  <label nz-radio [nzValue]="'small'">small</label>
  <label nz-radio [nzValue]="'middle'">middle</label>
  <label nz-radio [nzValue]="'large'">large</label>
</nz-radio-group>

<nz-space [nzSize]="size">
  <button nz-button *nzSpaceItem nzType="primary">primary</button>
  <button nz-button *nzSpaceItem nzType="default">default</button>
  <button nz-button *nzSpaceItem nzType="dashed">dashed</button>
  <button nz-button *nzSpaceItem nzType="text">text</button>
  <button nz-button *nzSpaceItem nzType="link">link</button>
</nz-space>
